C++ Vector resize() function

C++ Vector resize() function tutorial for beginners and professionals with examples on assign(), at(), back(), begin(), capacity(), cbegin(), cend(), clear(), crbegin(), crend(), data(), emplace(), end(), front(), rbegin(), resize(), size(), swap() etc.

<< Back to CPP

next → ← prev

C++ Vector resize()

It modifies the size of the vector to the specified value

Size changed to 4 and new value is

Syntax

Consider a vector v. Syntax would be:

v.resize(n,val);

Parameter

n : It is the new vector size.

val : If n is greater than the current vector size, then value(val) is inserted in the added space.

Return value

It does not return any value.

Example 1

Let's see a simple example when n is less than the current vector size.

#include<iostream>
#include<vector>
using namespace std;
int main()
{
	vector<int> v;
	for(int i=1;i<=10;i++)
	{
	v.push_back(i);
	}
	cout<<"Initial elements are :";
	for(int i=0;i<v.size();i++)
	cout<<v[i]<<" ";
	v.resize(5);
	cout<<'\n';
	cout<<"After resizing its size to 5,elements are :";
	for(int i=0;i<v.size();i++)
	cout<<v[i]<<" ";
	return 0;
}

Output:

     Initial elements are: 1 2 3 4 5 6 7 8 9 10 
After resizing its size to 5, elementsare: 1 2 3 4 5

Example 2

Let's see a simple example n is greater than the current vector size.

#include<iostream>
#include<vector>
using namespace std;
int main()
{
	vector<string>  v1{"java","C","C++"};
	cout<<"Elements of v1 are :";
	for(int i=0;i<v1.size();i++)
	cout<<v1[i]<<" ";
	v1.resize(5,".Net");
	for(int i=0;i<v1.size();i++)
	cout<<v1[i]<<" ";
	return 0;
}

Output:

Elements of v1 are :java C C++ java C C++ .Net .Net

Next TopicC++ Vector

← prev next →

.Net

.NET Array Dictionary List String 2D Async DataTable Dates DateTime Enum File For Foreach Format IEnumerable If IndexOf Lambda LINQ Parse Path Process Property Regex Replace Sort Split Static StringBuilder Substring Switch Tuple

Java

Core Array ArrayList HashMap String 2D Cast Character Console Deque Duplicates File For Format HashSet If IndexOf Lambda Math ParseInt Process Random Regex Replace Sort Split StringBuilder Substring Switch Vector While

Related Links

Adjectives Ado Ai Android Angular Antonyms Apache Articles Asp Autocad Automata Aws Azure Basic Binary Bitcoin Blockchain C Cassandra Change Coa Computer Control Cpp Create Creating C-Sharp Cyber Daa Data Dbms Deletion Devops Difference Discrete Es6 Ethical Examples Features Firebase Flutter Fs Git Go Hbase History Hive Hiveql How Html Idioms Insertion Installing Ios Java Joomla Js Kafka Kali Laravel Logical Machine Matlab Matrix Mongodb Mysql One Opencv Oracle Ordering Os Pandas Php Pig Pl Postgresql Powershell Prepositions Program Python React Ruby Scala Selecting Selenium Sentence Seo Sharepoint Software Spellings Spotting Spring Sql Sqlite Sqoop Svn Swift Synonyms Talend Testng Types Uml Unity Vbnet Verbal Webdriver What Wpf

TheDeveloperBlog.com